See also: Cephalopod limb
The phylum Mollusca includes many species with muscular hydrostats in the form of tentacles and arms. Octopuses do not have tentacles but rather have eight arms. Tentacles are distinguished in this context as being longer than arms, with suckers at their tips only. Squid and cuttlefish have eight arms like octopuses, and two extra flexible tentacles.
iodine 發表於 12-3-15 16:02
it should be arms.
tentacles are the two very long "arms" of squids.
但樓主問緊八爪魚wor
My understanding is that squid and cuttlefish have a pair of feeding tentacles while octopus has not. Therefore the arms of the octopus are more commonly referred to as "tentacles", since they are soft limbs.